很容易从相应的噻吩基醛中获得的3-(噻吩-2-基)-和3-(噻吩-3-基)烯丙胺可以与各种酸酐和α,β-不饱和酰氯(马来酸,顺丁烯二酸)相互作用,以及苯基马来酸酐,叔丁酰和肉桂酰氯等),导致形成噻吩并[2,3- f ]异吲哚核。通常,反应顺序包括三个连续的步骤:初始烯丙胺的氮原子的酰化,分子内Diels-Alder乙烯基芳烃(IMDAV)反应以及Diels-Alder加合物中二氢噻吩环的最终芳构化。彻底研究了该方法的范围和局限性。借助X射线分析表明,关键步骤IMDAV反应通过exo进行。-过渡态,引起目标杂环的单一非对映异构体的排他形成。在马来酸酐的情况下,该方法允许获得官能取代的噻吩并[2,3- f ]异吲哚羧酸,其对于进一步转化和随后的生物筛选是潜在有用的底物。
A regio‐ and enantioselective copper‐catalyzed 1,4‐conjugateaddition of trimethylaluminium to linear δ‐aryl‐substituted α,β,γ,δ‐unsaturated alkyl ketones was developed. A series of γ,δ‐unsaturated alkyl ketones were obtained in good yields with high regio‐ and enantioselectivity (up to 88% ee and 96:4 dr). Expansion of the reaction scope to substrates containing aromatic heterocycles also afforded
A compound having the formula:
1
[wherein Ar
1
represents a phenyl which may be substituted, Ar
2
represents a phenyl which may be substituted or a heterocyclic group which may be substituted, R
0
represents a hydrogen atom or a lower alkyl; R
1
represents a lower alkyl; R
2
to R
5
represent a hydrogen atom or an alkyl which may be substituted with halogen, n represents
0
to
2;
p represents
0
or
1;
q, r and s represent
0
to
2;
A represents a
4
- to
7
-membered carbon ring or a
4
- to
7
-membered heterocyclic group].
The compound of the present invention exhibits excellent antifugal activities.